and you can position 4041 18 in. out, just nut side of median focused @ 12 fret, 4041 @ ear height over right shoulder, KSM 18 in. out, side on, in figure of 8 configuration . . . While these and dozen's of other stereo, dual mono configurations are useful and valid, including matched SDCs (in X/Y, coincident, Blumien configurations), they do not present 'true' M/S profiles.
Which was the OP's question. Essentially as long as one of the mics is bi-directional any two mics can be used for M/S recording. To limit phase coloration, in M/S the capsules tend to be positioned as close together as possible (commercial clips tend to position mics top and bottom, but side by side, two stands with mics forming apex of 'V' aligned either horizontally or vertically, etc. are all employed)
One of the strengths of M/S is that mics of very different characters can be used to present, and control, a stereo field. Another reason I am fond of it is that for certain specific situations it can be used to counter some of the comb filtering artifacts of rooms of less then stellar acoustic properties. For this aspect aligning capsules tends to be fairly significant. In any case while a KSM44 in figure of 8 can be used for M/S, a matched pair of MK012 would not, typically, be a 'do it right' choice for M/S.